HARDtalk - Dr David Kilcullen, Pentagon counter insurgency adviser

Has Afghanistan become the unwinnable war? The surge in American troop numbers ordered by President Obama last year was supposed to shift the conflict conclusively in NATO's favour. But on the key measures, military, political, diplomatic it hasn't. David Kilcullen is a former Australian soldier and counter insurgency specialist with close links to US General David Petraeus. If NATO's Plan A is in trouble, what is Plan B?